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Produce high CPU load, memory, I/O to stress test your Linux box

There are times when you have to stress test your linux/unix box to see how the proxy, database, memcache or other applications running on top would perform under stress or resource crunch. Enter stress which is a deliberately simple workload generator for POSIX systems. It imposes a configurable amount of CPU, memory, I/O, and disk stress on the system. It is written in C, and is free software licensed under the GPLv2.